div class=ts-pagebuttonPage 1button div class=ts-image a href=https:reader043vdocumentsnetreader043viewer202202062061e29315f9011b3a4426ed18html5page1jpg target=_blank amp-img class=ts-thumb alt=Page 1: Published in Applied Optics 27 issue 22 4739-4746 1988 src=https:reader043vdocumentsnetreader043viewer202202062061e29315f9011b3a4426ed18html5thumbnails1jpg width=142 height=106 layout=responsive amp-imga divpPublished in Applied Optics 27 issue 22 4739-4746 1988which should be used for any reference to this workp p1pdivdiv class=ts-pagebuttonPage 2button div class=ts-image a href=https:reader043vdocumentsnetreader043viewer202202062061e29315f9011b3a4426ed18html5page2jpg target=_blank amp-img class=ts-thumb alt=Page 2: Published in Applied Optics 27 issue 22 4739-4746 1988 src=https:reader043vdocumentsnetreader043viewer202202062061e29315f9011b3a4426ed18html5thumbnails2jpg width=142 height=106 layout=responsive amp-imga divp2pdivdiv class=ts-pagebuttonPage 3button div class=ts-image a href=https:reader043vdocumentsnetreader043viewer202202062061e29315f9011b3a4426ed18html5page3jpg target=_blank amp-img class=ts-thumb alt=Page 3: Published in Applied Optics 27 issue 22 4739-4746 1988 src=https:reader043vdocumentsnetreader043viewer202202062061e29315f9011b3a4426ed18html5thumbnails3jpg width=142 height=106 layout=responsive amp-imga divp3pdivdiv class=ts-pagebuttonPage 4button div class=ts-image a href=https:reader043vdocumentsnetreader043viewer202202062061e29315f9011b3a4426ed18html5page4jpg target=_blank amp-img class=ts-thumb alt=Page 4: Published in Applied Optics 27 issue 22 4739-4746 1988 src=https:reader043vdocumentsnetreader043viewer202202062061e29315f9011b3a4426ed18html5thumbnails4jpg width=142 height=106 layout=responsive amp-imga divp4pdivdiv class=ts-pagebuttonPage 5button div class=ts-image a href=https:reader043vdocumentsnetreader043viewer202202062061e29315f9011b3a4426ed18html5page5jpg target=_blank amp-img class=ts-thumb alt=Page 5: Published in Applied Optics 27 issue 22 4739-4746 1988 src=https:reader043vdocumentsnetreader043viewer202202062061e29315f9011b3a4426ed18html5thumbnails5jpg width=142 height=106 layout=responsive amp-imga divp5pdivdiv class=ts-pagebuttonPage 6button div class=ts-image a href=https:reader043vdocumentsnetreader043viewer202202062061e29315f9011b3a4426ed18html5page6jpg target=_blank amp-img class=ts-thumb alt=Page 6: Published in Applied Optics 27 issue 22 4739-4746 1988 src=https:reader043vdocumentsnetreader043viewer202202062061e29315f9011b3a4426ed18html5thumbnails6jpg width=142 height=106 layout=responsive amp-imga divp6pdiv